Oraan, Revenant Conjurer

You may reveal the first card you draw on each
of your turns as you draw it. Whenever you
reveal an instant or sorcery card this way, you
may gain life equal to that card's converted mana
cost.
{t}: Instant and sorcery spells you cast this turn
gain: "For each {u}, {b} and {r} in the cost, you
may pay 2 life rather than pay that mana."